code: def test_get_direction_dir_sign(self):
      self.assertFalse(
          TCAV.get_direction_dir_sign(
              self.mymodel,
              self.acts,
              self.cav,
              self.concepts[0],
              self.class_id,
              None,
          )
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from tcav.activation_generator import ActivationGeneratorBase
  from tcav.cav import CAV
  from tcav.tcav import TCAV
  from tensorflow.python.platform import googletest
  import numpy
  import tensorflow
label_desc: Use image node_id 2 for calling the TcavTest obj's underlying member method code with example usage: obj.test_get_direction_dir_sign() without return types